#171B74#171B74

#171B74 is a dark, vivid blue. Relative luminance 0.022; OKLCH L 29.5% C 0.147 H 271.1°. Best body text is #FFFFFF at 14.53:1 contrast (WCAG AA passes).

Color values

HEX	#171B74
RGB	rgb(23, 27, 116)
HSL	hsl(237, 67%, 27%)
HSV	hsv(237, 80%, 45%)
CMYK	cmyk(80.2%, 76.7%, 0%, 54.5%)
CIE-LAB	lab(16.63, 31.74, -50.89)
CIE-LCH	lch(16.63, 59.97, 301.96°)
OKLab	oklab(29.47% 0.0028 -0.1473)
OKLCH	oklch(29.47% 0.147 271.1)
XYZ	xyz(3.8966, 2.2266, 16.7440)
Luminance	0.0223 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171B74 #747017

analogous

#174A74 #171B74 #411774

triadic

#171B74 #74171B #1B7417

tetradic

#171B74 #74174A #747017 #177441

square

#171B74 #74174A #747017 #177441

split-complementary

#171B74 #744117 #4A7417

monochromatic

#05061A #0D0F41 #171B74 #2127A7 #3037D6

Accessibility & contrast

On white

14.53

#171B74 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.45

#171B74 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171B74

14.53:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171B74	#FFFFFF	#000000	##FFFFFF
##171B74	1.00	14.53	1.45	14.53
#FFFFFF	14.53	1.00	21.00	1.00
#000000	1.45	21.00	1.00	21.00
##FFFFFF	14.53	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002E77

Deuteranopia (green-blind)

#002472

Tritanopia (blue-blind)

#003546

Achromatopsia (no color)

#292929

Design tokens & code

CSS

--color: #171b74;
/* rgb */ color: rgb(23, 27, 116);
/* oklch */ color: oklch(29.5% 0.147 271.1);

Tailwind

colors: {
  custom: {
    50: '#66589d',
    500: '#171b74',
    950: '#000000',
  },
}

SCSS

$custom: #171b74;
$custom-light: #66589d;
$custom-dark: #000000;

JSON

{
  "hex": "#171b74",
  "rgb": {
    "r": 23,
    "g": 27,
    "b": 116
  },
  "hsl": {
    "h": 237.419,
    "s": 66.906,
    "l": 27.255
  },
  "oklch": {
    "l": 0.29466,
    "c": 0.14736,
    "h": 271.1
  },
  "luminance": 0.02227
}

Semantic roles & 50–950 ramp

primary

#171B74

secondary

#A9A53D

accent

#E23EEA

background

#F6F5F9

surface

#EBE9F2

border

#C6C5CC

text

#07030E

muted

#7A787E

Preview Lab

Preview with #171B74

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →